Answer Posted / mark
A surrogate key from a data warehouse schema is used to join
tables both in general SQL queries against the data
warehouse and for joining tables in the universe schema.
From 6.5.1, it can also be used as part of the keys tab
within object definition to improve query performance in
certain instances.
Given that it has no meaning outside of the data warehouse
technical sphere, it should not be created as an object.
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